Analyzing apparatus with a motor and a cam disk and analyzing process using such analyzing apparatus

An analyzing process comprising the steps of:

• providing an analyzer, the analyzer comprising:
• a measuring chamber with an inflow side and an outflow side, said measuring chamber being configured to be at least temporarily in fluid communication on the inflow side with an environment of the analyzer;
• a sensor configured to measure an indicator of the amount and/or concentration of the substance in a gas sample located in the measuring chamber;
• a suction chamber unit with a variable volume;
• a cam disk configured to be rotatable about an axis;
• a motor configured to rotate the cam disk about the axis;
• and an actuating unit configured to be moved relative to the measuring chamber in a first direction and a second direction opposite to the first direction, wherein the actuating unit is mechanically connected to the suction chamber unit such that movement of the actuating unit in the first direction is configured to increase the volume of the suction chamber unit and movement of the actuating unit in the second direction is configured to reduce the volume of the suction chamber unit;
• positioning the suction chamber unit in fluid communication on the outflow side with the measuring chamber;
• mechanically coupling the actuating unit to the cam disk such that each rotational position of the cam disk relative to the axis is configured to define a respective position of the actuating unit and thus a volume of the suction chamber unit;
• increasing the volume of the suction chamber unit such that gas from the environment is sucked into the measuring chamber through the fluid communication on the inflow side;
• with the sensor, analyzing a gas sample emitted by a test person for a predetermined substance;
• and reducing the volume of the suction chamber unit such that gas is expelled out of the measuring chamber.

An analyzing process for analyzing a gas for a predetermined substance using an analyzer, the analyzer comprising:

• a measuring chamber with an inflow side and an outflow side, said measuring chamber being in fluid communication on the inflow side with an environment of the analyzer;
• a sensor;
• a suction chamber unit with a variable volume;
• a motor;
• a cam disk configured to be rotatable about an axis;
• and an actuating unit configured to be moved relative to the measuring chamber in a first direction and a second direction opposite to the first direction, the analyzing process comprising the steps of:
• with the motor, rotating the cam disk about the axis;
• providing a mechanical coupling between the cam disk and the actuating unit to cause each rotational position of the cam disk relative to the axis to define a respective position of the actuating unit and thus a respective volume of the suction chamber unit;
• moving the actuating unit in the first direction to increase the volume of the suction chamber unit, which increase in volume of the suction chamber unit causes gas from the environment to be sucked through the fluid communication on the inflow side into the measuring chamber;
• with the sensor, measuring an indicator of the amount and/or concentration of the substance in a gas sample located in the measuring chamber;
• and moving the actuating unit in the second direction to reduce the volume of the suction chamber unit, which reduction of the volume of the suction chamber unit causes gas to be expelled out of the measuring chamber.